bundle-init - Generates a Gemfile into the current working directory

       Init  generates  a  default  [Gemfile(5)][Gemfile(5)]  in  the  current  working directory. When adding a
       [Gemfile(5)][Gemfile(5)] to a gem with a gemspec,  the  --gemspec  option  will  automatically  add  each
       dependency listed in the gemspec file to the newly created [Gemfile(5)][Gemfile(5)].

       Included  in  the  default  [Gemfile(5)][Gemfile(5)] generated is the line #frozen_string_literal:true.
       This is a magic comment supported for the first time in Ruby 2.3. The presence of this  line  results  in
       all string literals in the file being implicitly frozen.

bundle-init - Generates a Gemfile into the current working directory

--gemspec=GEMSPEC
              Use the specified .gemspec to create the [Gemfile(5)][Gemfile(5)]

       --gemfile=GEMFILE
              Use the specified name for the gemfile instead of Gemfile

Gemfile(5) https://bundler.io/man/gemfile.5.html

                                                  January 2025                                    BUNDLE-INIT(1)

bundleinit [--gemspec=FILE]